30:17
STRUCTURE
2680 Views
01:56
READING COMPREHENSION &VOCABULARY
1566 Views
01:52
The Form of Irregular Verbs
1570 Views
01:59
The Tense of the Passive Voice
1700 Views
09:31
Changing from Active into Passive
1428 Views
07:20
The Form of the Passive Voice
1655 Views
03:29
What is the Passive Voice?
1683 Views
03:45
The Form of the Active Voice
1645 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2240 Views
03:20
Since vs For
1755 Views
04:50
Have or Has
1580 Views
00:49
Key Words: Present Perfect
3581 Views
09:03
The Use of the Present Perfect
1633 Views
03:08
Meaning and Form
1682 Views
02:40
Writing Formal Letters
1662 Views
03:10
Language Use
2228 Views
09:35
Parallel Structure
1804 Views
04:35
Prepositions of Instruments and Means
1612 Views
03:27
Polite Requests
1681 Views
06:30
May as a Modal of Permission and Request
1809 Views
04:11
Can as a Modal of Permission and Request
1622 Views
02:50
عناصر الاداء
1532 Views
03:45
شركة ستيرن
1094 Views
01:15
مقياس القيمة المضافة
1352 Views
02:58
مقياس الربحية
1254 Views
02:39
معايير دركر
1460 Views
03:51
مقايس الاداء
1459 Views
01:41
اتخاذ اجراءات تصحيحية
1139 Views
01:52
المرحلة الثانية من الرقابة
1283 Views
02:49
مراحل الرقابة
2732 Views