30:17
STRUCTURE
2354 Views
01:56
READING COMPREHENSION &VOCABULARY
1298 Views
01:52
The Form of Irregular Verbs
1306 Views
01:59
The Tense of the Passive Voice
1383 Views
09:31
Changing from Active into Passive
1159 Views
07:20
The Form of the Passive Voice
1366 Views
03:29
What is the Passive Voice?
1408 Views
03:45
The Form of the Active Voice
1367 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1734 Views
03:20
Since vs For
1510 Views
04:50
Have or Has
1327 Views
00:49
Key Words: Present Perfect
3124 Views
09:03
The Use of the Present Perfect
1320 Views
03:08
Meaning and Form
1358 Views
02:40
Writing Formal Letters
1354 Views
03:10
Language Use
1944 Views
09:35
Parallel Structure
1499 Views
04:35
Prepositions of Instruments and Means
1332 Views
03:27
Polite Requests
1400 Views
06:30
May as a Modal of Permission and Request
1385 Views
04:11
Can as a Modal of Permission and Request
1202 Views
02:50
عناصر الاداء
1339 Views
03:45
شركة ستيرن
906 Views
01:15
مقياس القيمة المضافة
1132 Views
02:58
مقياس الربحية
1099 Views
02:39
معايير دركر
1254 Views
03:51
مقايس الاداء
1271 Views
01:41
اتخاذ اجراءات تصحيحية
975 Views
01:52
المرحلة الثانية من الرقابة
954 Views
02:49
مراحل الرقابة
2263 Views