30:17
STRUCTURE
2438 Views
01:56
READING COMPREHENSION &VOCABULARY
1358 Views
01:52
The Form of Irregular Verbs
1373 Views
01:59
The Tense of the Passive Voice
1450 Views
09:31
Changing from Active into Passive
1225 Views
07:20
The Form of the Passive Voice
1427 Views
03:29
What is the Passive Voice?
1472 Views
03:45
The Form of the Active Voice
1425 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1893 Views
03:20
Since vs For
1573 Views
04:50
Have or Has
1387 Views
00:49
Key Words: Present Perfect
3273 Views
09:03
The Use of the Present Perfect
1392 Views
03:08
Meaning and Form
1439 Views
02:40
Writing Formal Letters
1425 Views
03:10
Language Use
2012 Views
09:35
Parallel Structure
1584 Views
04:35
Prepositions of Instruments and Means
1395 Views
03:27
Polite Requests
1492 Views
06:30
May as a Modal of Permission and Request
1474 Views
04:11
Can as a Modal of Permission and Request
1289 Views
02:50
عناصر الاداء
1389 Views
03:45
شركة ستيرن
960 Views
01:15
مقياس القيمة المضافة
1256 Views
02:58
مقياس الربحية
1155 Views
02:39
معايير دركر
1316 Views
03:51
مقايس الاداء
1324 Views
01:41
اتخاذ اجراءات تصحيحية
1020 Views
01:52
المرحلة الثانية من الرقابة
1017 Views
02:49
مراحل الرقابة
2373 Views